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Recording artists Katy Perry (L) and John Mayer attend the Sony Music Entertainment Post-Grammy Reception at The Palm on January 26, 2014 in Los Angeles, California. (Photo by Larry Busacca/Getty Images for Sony Music Entertainment)

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John Mayer and Katy Perry perform at Barclays Center of Brooklyn on December 17, 2013 in New York City. (Photo by Kevin Mazur/WireImage)

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John Mayer and Katy Perry attend Hollywood Stands Up To Cancer Event with contributors American Cancer Society and Bristol Myers Squibb hosted by Jim Toth and Reese Witherspoon and the Entertainment Industry Foundation on Tuesday, January 28, 2014 in Culver City, California. (Photo by Charley Gallay/Getty Images for Entertainment Industry Foundation)

Charley Gallay/Entertainment/Getty Images

KATY-PERRY-JOHN-MAYER-BACKSTAGE-1

Recording artists Katy Perry (L) and John Mayer attend the Sony Music Entertainment Post-Grammy Reception at The Palm on January 26, 2014 in Los Angeles, California. (Photo by Larry Busacca/Getty Images for Sony Music Entertainment)

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John Mayer and Katy Perry perform at Barclays Center of Brooklyn on December 17, 2013 in New York City. (Photo by Kevin Mazur/WireImage)

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John Mayer and Katy Perry perform at Barclays Center of Brooklyn on December 17, 2013 in New York City. (Photo by Kevin Mazur/WireImage)

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John Mayer and Katy Perry perform at Barclays Center of Brooklyn on December 17, 2013 in New York City. (Photo by Kevin Mazur/WireImage)